- Differential pressure(dP) measurement for flowmeters
- In-cylinder pressure measurement for IC engines
- Fuel pressure measurement for common-rail injector
- dP mesurement for DPF
- Atmospheric pressure measurement
- Simultaneous multiple points pressure measurement
About pressure measurement
There are many fields of applications for pressure measurement. Measureing cylinder pressure for IC engine is required to withstand high temperature/pressure and fast response, while measuring atmospheric pressure is required to have good accuracy/repeatability and high resolutions. It is essential to choose a pressure gauge to meet each application. Sokken will be able to advise you an appropriate pressure gauge for your request.
It is noticed that one of the most difficult measurement for IC engine is to measure correct exhaust manifold pressure.
The model GCM200 is an only pressure gauge in the world to be able to measure the exhaust manifold pressure correctly under very high temperature up to 800C, pressure pulsating violently from -80 to 500kPa, strong vibration from 20 to 50G and the fast response from DC to 5kHz are also desired.
It may be destroyed for lack of cooling water if the water cooled type pressure transducer with strain gauges is used and this may lead to the large drift of sensitivity and will cause a problem. It is not able to use this in high accuracy due to less S/N ratio caused by the vibration from exhaust system.
The temperature drift is reduced by using a water cooled Piezo-electric transducer but no absolute pressure signal is provided and this may lead to a big problem to determine the atmospheric base line for measuring catalyst gas flow, pressure drop across DPF and the gas exchange rate in DPF.
The model GCM200 is an only reliable pressure gauge to be able to measure the exhaust pressure accurately with fast response and high S/N ratio by employing the water cooled Piezo-electric transducer.
The unique system of GCM200 to separate the pressure dynamic range in low frequency and in high frequency respectively enable to measure the exhaust manifold pressure accurately with fast response and high S/N ratio.
The Sokken model PGT-500 is a pressure calibration system with generating square wave pressure for the dynamic type transducers and it can be replaced to a conventional hydraulic type dead weight pressure testers. The output from the dynamic type transducers are normally in decay with time for static pressure due to its theoretical configuration and a special skill and a lot of time was required for the precise calibration and less safety for operator to handle a heavy weight of 50kgs.The PGT-500 has several merits to save labor, time and keep safety for operators without handling heavy weights. The correct results are provided within a few minutes only fitting a transducer to the system and to operate a user interface by the operator.